Analog to digital encoding apparatus for directly reading out information

• US 3,312,828 A
• Filed: 05/09/1963
• Issued: 04/04/1967
• Est. Priority Date: 05/09/1963
• Status: Expired due to Term

• Current Assignee: Sidney A. Wingate
• Original Assignee: Sidney A. Wingate
• Inventors: Wingate, Sidney A.
• Application Number:
  US04/279,071
• Time in Patent Office: 1,426 Days
• US Class Current: 341/9
• CPC Class Codes: H03M 1/143 in pattern-reading type converters, e.g. having both absolute and incremental tracks on one disc or strip H03M1/16 takes precedence
• CPC Class Codes: H03M 1/205 using resistor strings for redistribution of the original reference signals or signals derived therefrom
• CPC Class Codes: H03M 1/303 Circuits or methods for processing the quadrature signals

Claims

1. AN ENCODING SYSTEM COMPRISING CODE MEANS PRESENTING A PLURALITY OF TRACK MEANS, AN ARRAY OF GROUPS OF PHOTOCELL MEANS, SAID CODE MEANS AND SAID ARRAY BEING CONSTRAINED FOR RELATIVE MOVEMENT WITH SAID PLURALITY OF TRACK MEANS AND SAID PLURALITY OF PHOTOCELL MEANS IN REGISTRATION, SAID PHOTOCELL MEANS OF EACH GROUP BEING RELATED TO EACH OTHER PREDETERMINEDLY, ILLUMINATION MEANS FOR DIRECTING RADIATION TO SAID PLURALITY OF TRACK MEANS, EACH OF SAID PLURALITY OF TRACK MEANS HAVING FIRST REGIONS AND SECOND REGIONS FOR DIFFERENTLY ASSOCIATING SAID RADIATION WITH PHOTOCELL MEANS REGISTERED THEREWITH, SAID GROUPS OF PHOTOCEL MEANS GENERATING GROUPS OF PREDETERMINEDLY DIFFERENT SIGNALS REPRESENTING RELATIVE POSITIONS OF SAID CODE MEANS AND SAID ARRAY, EACH OF SAID PREDETERMINEDLY DIFFERENT SIGNALS BEING CHARACTERIZED BY PHASE DIFFERENCES, FIRST ANALYZING MEANS FOR DISTINGUISHING AMONG THE PREDETERMINEDLY DIFFERENT SIGNALS WITHIN A SELECTED GROUP TO PRODUCE RESOLVED SIGNALS REPRESENTING COMPONENTS OF SAID DIFFERENT SIGNALS WITHIN SAID SELECTED GROUP, EACH OF SAID RESOLVED SIGNALS BEING CHARACTERIZED BY PHASE DIFFERENCES, SAID PHASE DIFFERENCES OF SAID RESOLVED SIGNALS BEING GREATER IN NUMBER THAN SAID PHASE